#include "srp_constants.h"

#include <stddef.h>
#include <stdbool.h>
struct NGHex {
  const char *n_hex;
  const char *g_hex;
};

/* All constants here were pulled from Appendix A of RFC 5054 */
static const struct NGHex global_Ng_constants[] = {
	{/* 512 */
		"D66AAFE8E245F9AC245A199F62CE61AB8FA90A4D80C71CD2ADFD0B9DA163B29F2A34AFBDB3B"
		"1B5D0102559CE63D8B6E86B0AA59C14E79D4AA62D1748E4249DF3",
		"2"
	},
	{/* 768 */
		"B344C7C4F8C495031BB4E04FF8F84EE95008163940B9558276744D91F7CC9F402653BE7147F"
		"00F576B93754BCDDF71B636F2099E6FFF90E79575F3D0DE694AFF737D9BE9713CEF8D837ADA"
		"6380B1093E94B6A529A8C6C2BE33E0867C60C3262B",
		"2"
	},
	{/* 1024 */
		"EEAF0AB9ADB38DD69C33F80AFA8FC5E86072618775FF3C0B9EA2314C9C256576D674DF7496"
		"EA81D3383B4813D692C6E0E0D5D8E250B98BE48E495C1D6089DAD15DC7D7B46154D6B6CE8E"
		"F4AD69B15D4982559B297BCF1885C529F566660E57EC68EDBC3C05726CC02FD4CBF4976EAA"
		"9AFD5138FE8376435B9FC61D2FC0EB06E3",
		"2"
	},
	{/* 2048 */
		"AC6BDB41324A9A9BF166DE5E1389582FAF72B6651987EE07FC3192943DB56050A37329CBB4"
		"A099ED8193E0757767A13DD52312AB4B03310DCD7F48A9DA04FD50E8083969EDB767B0CF60"
		"95179A163AB3661A05FBD5FAAAE82918A9962F0B93B855F97993EC975EEAA80D740ADBF4FF"
		"747359D041D5C33EA71D281E446B14773BCA97B43A23FB801676BD207A436C6481F1D2B907"
		"8717461A5B9D32E688F87748544523B524B0D57D5EA77A2775D2ECFA032CFBDBF52FB37861"
		"60279004E57AE6AF874E7303CE53299CCC041C7BC308D82A5698F3A8D0C38271AE35F8E9DB"
		"FBB694B5C803D89F7AE435DE236D525F54759B65E372FCD68EF20FA7111F9E4AFF73",
		"2"
	},
	{/* 4096 */
		"FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E08"
		"8A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B"
		"302B0A6DF25F14374FE1356D6D51C245E485B576625E7EC6F44C42E9"
		"A637ED6B0BFF5CB6F406B7EDEE386BFB5A899FA5AE9F24117C4B1FE6"
		"49286651ECE45B3DC2007CB8A163BF0598DA48361C55D39A69163FA8"
		"FD24CF5F83655D23DCA3AD961C62F356208552BB9ED529077096966D"
		"670C354E4ABC9804F1746C08CA18217C32905E462E36CE3BE39E772C"
		"180E86039B2783A2EC07A28FB5C55DF06F4C52C9DE2BCBF695581718"
		"3995497CEA956AE515D2261898FA051015728E5A8AAAC42DAD33170D"
		"04507A33A85521ABDF1CBA64ECFB850458DBEF0A8AEA71575D060C7D"
		"B3970F85A6E1E4C7ABF5AE8CDB0933D71E8C94E04A25619DCEE3D226"
		"1AD2EE6BF12FFA06D98A0864D87602733EC86A64521F2B18177B200C"
		"BBE117577A615D6C770988C0BAD946E208E24FA074E5AB3143DB5BFC"
		"E0FD108E4B82D120A92108011A723C12A787E6D788719A10BDBA5B26"
		"99C327186AF4E23C1A946834B6150BDA2583E9CA2AD44CE8DBBBC2DB"
		"04DE8EF92E8EFC141FBECAA6287C59474E6BC05D99B2964FA090C3A2"
		"233BA186515BE7ED1F612970CEE2D7AFB81BDD762170481CD0069127"
		"D5B05AA993B4EA988D8FDDC186FFB7DC90A6C08F4DF435C934063199"
		"FFFFFFFFFFFFFFFF",
		"5"
	},
	{/* 8192 */
		"FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E08"
		"8A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B"
		"302B0A6DF25F14374FE1356D6D51C245E485B576625E7EC6F44C42E9"
		"A637ED6B0BFF5CB6F406B7EDEE386BFB5A899FA5AE9F24117C4B1FE6"
		"49286651ECE45B3DC2007CB8A163BF0598DA48361C55D39A69163FA8"
		"FD24CF5F83655D23DCA3AD961C62F356208552BB9ED529077096966D"
		"670C354E4ABC9804F1746C08CA18217C32905E462E36CE3BE39E772C"
		"180E86039B2783A2EC07A28FB5C55DF06F4C52C9DE2BCBF695581718"
		"3995497CEA956AE515D2261898FA051015728E5A8AAAC42DAD33170D"
		"04507A33A85521ABDF1CBA64ECFB850458DBEF0A8AEA71575D060C7D"
		"B3970F85A6E1E4C7ABF5AE8CDB0933D71E8C94E04A25619DCEE3D226"
		"1AD2EE6BF12FFA06D98A0864D87602733EC86A64521F2B18177B200C"
		"BBE117577A615D6C770988C0BAD946E208E24FA074E5AB3143DB5BFC"
		"E0FD108E4B82D120A92108011A723C12A787E6D788719A10BDBA5B26"
		"99C327186AF4E23C1A946834B6150BDA2583E9CA2AD44CE8DBBBC2DB"
		"04DE8EF92E8EFC141FBECAA6287C59474E6BC05D99B2964FA090C3A2"
		"233BA186515BE7ED1F612970CEE2D7AFB81BDD762170481CD0069127"
		"D5B05AA993B4EA988D8FDDC186FFB7DC90A6C08F4DF435C934028492"
		"36C3FAB4D27C7026C1D4DCB2602646DEC9751E763DBA37BDF8FF9406"
		"AD9E530EE5DB382F413001AEB06A53ED9027D831179727B0865A8918"
		"DA3EDBEBCF9B14ED44CE6CBACED4BB1BDB7F1447E6CC254B33205151"
		"2BD7AF426FB8F401378CD2BF5983CA01C64B92ECF032EA15D1721D03"
		"F482D7CE6E74FEF6D55E702F46980C82B5A84031900B1C9E59E7C97F"
		"BEC7E8F323A97A7E36CC88BE0F1D45B7FF585AC54BD407B22B4154AA"
		"CC8F6D7EBF48E1D814CC5ED20F8037E0A79715EEF29BE32806A1D58B"
		"B7C5DA76F550AA3D8A1FBFF0EB19CCB1A313D55CDA56C9EC2EF29632"
		"387FE8D76E3C0468043E8F663F4860EE12BF2D5B0B7474D6E694F91E"
		"6DBE115974A3926F12FEE5E438777CB6A932DF8CD8BEC4D073B931BA"
		"3BC832B68D9DD300741FA7BF8AFC47ED2576F6936BA424663AAB639C"
		"5AE4F5683423B4742BF1C978238F16CBE39D652DE3FDB8BEFC848AD9"
		"22222E04A4037C0713EB57A81A23F0C73473FC646CEA306B4BCBC886"
		"2F8385DDFA9D4B7FA2C087E879683303ED5BDD3A062B3CF5B3A278A6"
		"6D2A13F83F44F82DDF310EE074AB6A364597E899A0255DC164F31CC5"
		"0846851DF9AB48195DED7EA1B1D510BD7EE74D73FAF36BC31ECFA268"
		"359046F4EB879F924009438B481C6CD7889A002ED5EE382BC9190DA6"
		"FC026E479558E4475677E9AA9E3050E2765694DFC81F56E880B96E71"
		"60C980DD98EDD3DFFFFFFFFFFFFFFFFF",
		"13"
	},
	{0, 0} /* null sentinel */
};

int librist_get_ng_constants(librist_srp_ng_e ng_pair, const char **n, const char **g)
{
	if (*n != NULL || *g != NULL) {
		return -1;
	}
	int i = 0;
	while (true) {
		if (global_Ng_constants[i].n_hex == NULL) {
			return -1;
		}
		if (i == (int)ng_pair) {
			*n = global_Ng_constants[i].n_hex;
			*g = global_Ng_constants[i].g_hex;
			return 0;
		}
		i++;
	}


}
